Patent US3876887A successfully refreshed from Google Patents.
US3876887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mos amplifier
Assignee: Intel Corp
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Filing: 1973-07-18
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Granted: 1975-04-08
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Expires: 1993-07-18
Abstract
Abstract A metal-oxide-semiconductor (MOS) differential amplifier particularly suitable for sensing the state of a memory cell, which includes a pair of column lines, is disclosed. The differential amplifier is biased such that it operates in a linear region and is capacitively coupled to the column lines.
Inventors
- 👤 John A Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:06
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/401; G11C11/4063; G11C11/407; G11C11/409; G11C11/4091; G11C11/402; G11C11/4023; H; H03; H03K; H03K5/00; H03K5/01; H03K5/02; H03K5/023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
An amplifier for sensing the difference in potential between a pair of lines comprising: a first electrical source; a first capacitor; a first leg which includes at least one MOS device coupled to one of said lines through said first capacitor, said first leg being coupled to said first electrical source; a second capacitor; a second leg coupled to said first leg and to said first electrical source, said second leg including at least one MOS device coupled to the other of said lines through said second capacitor; circuit biasing means coupled to said MOS device of said first leg and said MOS device of said second leg; a second electrical source coupled to said circuit biasing means for biasing said MOS device of said first leg and said MOS device of said second leg such that said devices operate in a generally linear region; whereby the current flowing through said first and second leg is representative of the potential on said lines.
Claim 2
Dependent Claim
163 words
An amplifier for sensing the difference in potential between a pair of lines comprising: a first electrical source; a first capacitor; a first leg which includes at least one MOS device coupled to one of said lines through said first capacitor, said first leg being coupled to said first electrical source; a second capacitor; a second leg coupled to said first leg and to said first electrical source, said second leg including at least one MOS device coupled to the other of said lines through said second capacitor; circuit biasing means coupled to said MOS device of said first leg and said MOS device of said second leg; a second electrical source coupled to said circuit biasing means for biasing said MOS device of said first leg and said MOS device of said second leg such that said devices operate in a generally linear region; whereby the current flowing through said first and second leg is representative of the potential on said lines.
Claim 3
Dependent Claim
19 words
The amplifier defined in claim 1 including means for selectively equalizing potential between said first and said second capacitors.
Claim 4
Dependent Claim
40 words
The amplifier defined in claim 2 wherein said equalization means comprises an MOS device which includes a source terminal, a drain terminal and a gate, said source terminal and drain terminal being coupled between said first and said second capacitors.
Claim 5
Dependent Claim
20 words
The amplifier defined in claim 1 wherein said first and said second capacitors are coupled to said first electrical source.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |